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A news story published several years ago about sleep deprivation in America noted that lack of sleep causes highway accidents and deaths. According to the article 51% of adult drivers admitted to driving while drowsy. A researcher studying night shift workers hypothesized that the proportion who drove while drowsy would be larger among those workers. A sample of 500 night shift workers found that 285 admitted to driving while drowsy. Is there sufficient evidence to conclude that the proportion of night shift workers who drive while drowsy is greater than the proportion reported in the news story?
Perform the appropriate hypothesis test, using a significance level of 0.05.
According to the Oregon Bar Association, approximately 65% of the people who take the bar exam to practice law in Oregon pass the exam.
CD Camera produces a new camera that it claims can take an average of more than 7 photographs per second. A test of 36 randomly selected cameras yielded the following sample values:
Define the term independent and independent variable for this study - describe the scale of measurement used for the independent variable.
What is the total possible number of deals in a bridge game? A deal is a distribution of 52 cards to four players, each receiving 13 cards.
According to Thomas Kuhn on his "The Structure of Scientific Revolution", "the decision to reject one paradigm is always simultaneously the decision to accept.
A card is drawn from a standard 52 card deck. I'm the card is a king you win 20 otherwise you lose $2. What is the expected value of the game?
The greater the region of rejection, the more powerful the experiment. 3.22. The probability P(y is in region of rejection) = a whether the null hypothesis
What model might you use to model X?- What is the mean number of episodes in this period?- What is the probability that there will be no episodes in this period?
Can you give me example of a research question that involves estimating a characteristic about the population of part-time students at college.
a) Calculate the mean absolute deviation E(|X - µ|) for X, the number on a six-sided die.
Consider the mean scores of random samples of 40 AP Statistics students. Describe the sampling model for these means (shape, center, and spread).
What are the assumptions underlying a normal distribution? What are the assumptions underlying a binomial distribution? Why do we want to assume that our sample data represent a population distribution?
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